Door



` G. A. SHEFFIELD.

DOOR.

APPLICATION FILED JUNE I2. 1920.

Patented Nov.- 28, 1922'.

A2 SHEEIS-SHEEI 2.

'Patented Nov. 28, 19272.

UNED Arras GUY vSHEIEIIIEILD, F ST. PETERSBURG, FLORIDA.

DOOR.

Application medium 12,

To all whom it may concern:

Be it known that I, GUY A. SHEFFIELD, a citizen of the United States, residing at St.

Petersburg, in the county of Pinellas and State of Florida, have invented a new and useful Door, of which the following is a specification. i

This invention relates to doors of that type made up Vof sections adapted to be rolled about a winding core, one of the objects of the invention being to provide a structure of this character which is very simple in construction and can be installed readily for ther purpose of closing door or window openings or for use as a movable partition within a structure.

,Another object is to provide adevice of this character the sections of which' are so proportioned as to fit `snugly around the winding core when the door is shifted to .open position.

A still. further object is to provide simpleand eiicient means for counterbalancing the doorand vfor holding it in any position to which itmay be moved.

A still further object is to provide a novel y arrangementof` links. for connecting the relatively movable members of the door.

With the foregoing and other objects in view, whichwillappear as the description proceeds, the invention resides in the combination and arrangement o'f parts and in the details of construction hereinafter described and claimed, itbeing understood that, within the scope of what is claimedv` changes in the precise embodiment of the invention shown can be made without de- I parting from the spirit of the invention.

ing links.

Referring to the. gures by charactersof reference 1 designates a shaft which can be mounted in hangers 2 or in any other suitable supports, this shaft being provided at desired intervals with angular wheels 3 adapted to rotate with the shaft and form- 15520.y seriai No. 388,501.

ing, with said shaft, a core about which the door is adapted to be wrapped when moved to open position. In the present instance the wheels have been shown hexagonal but it is to be understood that they can be of any other shape desired. Secured to these wheels isa slat 4 constitutingone end member of the door and secured to this 'slat are metal strips 5 having reduced ends or tongues 6 bent to form eyes 7 These eyes are adapted towork within openings 8 formed in straps 9 and each of these straps is provided at its other end with an eye 7 similar to the eye carried by each strip 5. The straps 9 are arranged in groups, each group consisting of two or more straps and all of the straps of each group are secured to a slat or door section 10. Enough'of these lsections are provided to completely close the opening where the door is located and the slats vary in width so that when the door is rolled upon the core, the superposed slats will fit properly one upon thel other, as clearly shown in Figure 2. Notches 11 are formed in the longitudinal edges of the slats to accommodate the eyes 7 and these l slats or doorv sections are ada-pted,when in 'alignment,vto abut along their longitudinal edges as shown at the right of Figure 2. While each of the door sections, in the form illustrated,- is formed of-a single slat, which can be of wood or metal, it is to be understobd that if desired each of these sections can. consist of two 'or more strips or slats either contacting. or spaced apart or can be made 'of'spaced strips carrying netting or the like. These forms are so obvious that itis not deemed necessary 4to illustrate or describe themin detail.

Secured to each` end portion of the shaft 1 'is a pulley having a helical groove, as indicated at 12 in F igure 1. Secured to each n of these pulleys is one end of' a flexible connection 13 which can be in 'the form of a slender metal cable `or a rope, this connection being attached toa weight 14 and being preferably held close to the adjacent wall by a guide roller 15.

The parts are so proportioned that when the door is extended to closed position the weights are elevated and exert their greatest leverage upon the door, thereby to properly counterbalance it. As the door is moved upwardly, however, and its weight is reduced below the core, the connections 13 unwind from the pulleys and move inwardly toward the axis of rotation thereof, thereby proportionately reducing the leverage eX- erted through the pulleys so that the Weights will continue properly to counterbalance the door. v i

that is claimed is:

A rolling door including a. shaft, polygonal wheels fixed thereto and cooperating to form a core, avfiexible curtain-like member mounted to roll on said Wheels and composed of connected parallel sections, one of `which is secured to the Wheels and the others adapted to hang freely, said sections comprising series of different Widths increasing in proportion to their distance from the. shaft adapting them to be Wound in superposed relation on the core, said sections having notches in their inner faces along each jacent section, longitudinally spaced metal .straps extending transversely across the inner faces of said sections and having eyes located in said notches, the eyes of the straps of one section being hingedly connected with those of the adjacent section, the edges be- -Vond the notches abutting when the curtain is unwound, and means to facilitate Winding u'p of the curtain-like member.

In testimony that I claim the foregoing as my own, I have hereto aixed my signature in the presence of two Witnesses.

GUY A. SHEFFIELD.

IVitnesses HERBERT D. LAWSON, IVY E. SIMPSON. 

